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Lafferty, St. Clair and Brassfield Limestones

Lafferty, St. Clair and Brassfield Limestones
StateArkansas
NameLafferty, St. Clair and Brassfield Limestones
Geologic agePhanerozoic | Paleozoic | Silurian
Original map labelSlsb
CommentsLafferty Limestone-mainly limestone with minor mudstone, St. Clair and Brassfield Limestones-100% bioclastic limestone. Approximately 220 ft. maximum thickness.
Primary rock typelimestone
Secondary rock typemudstone
Other rock types
Lithologic constituents
Major
Sedimentary > Carbonate > Limestone (Bed)
Minor
Sedimentary > Clastic > Mudstone (Bed)
Map references
Haley, B. R., Glick, E. E., Bush, W. V.; Clardy, B. F.; Stone, C. G.; Woodward, M. B., Zachry, D.L., 1993, Geologic Map of Arkansas: U.S.Geological Survey Special Geologic Map. Scale 1:500K
Unit references
Craig W. W, Wise, O, and McFarland, J. D. III,1984, A guidebook to the post-St. Peter Ordovician and the Silurian and Devonian rocks of north-central Arkansas: Guidebook - Arkansas Geological Commission, vol.84-1, 49 pp.
Geographic coverageIndependence - Izard - Newton - Searcy - Stone

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